6K trips out at even lowest power

Now that I have the low audio on receive taken care of...I find I have another problem.I can't transmit. Set the rig up for cw (my most commonly used mode)Barefoot operation. Manual antenna switch between 5K and 6K. Same paddle, just unplugged from 5K and plugged into 6K.

If I move the RF Power slider past 2 or 3, any attempt to send cw results in the rig tripping out as if it had no antenna. Pulsating receive, and
only way to reset is with a hard power reset.The same thing with SSB, key the mic with the power slider advanced even slightly and same result.I'm open to suggestions.I made one cw qso a few months back. Since then just used it to learn how to use all the receive functions.

I use DDUt and just switch between Legacy and Signature.The 5K and 6K each have their own 50 amp (non switching) power supplies.

A slice indicates Red ANT 1 2.4K USB MIC 19, Comp (not used) and Mon @ 29.(I have a manual switch that I use to switch the 5K or 6K to the antennas)

I of course had considered that possibility. The rig now weighs 6 # more than it's manufactured weight. (kidding but close). None of my other rigs display rfi at the same rf level. Been at this almost 50 years so have more than a passing experience with rfi.I will of course continue to try to solve, and that includes more ferrites. (I have a big box of them in the desk drawer). :-)))

Seems all fixed now. I went to garage and went through my box of heavy copper braid. Found one long enough with soldered lugs on each end.Once I got that to the main copper strip mounted on the wall, it 'seems' my rfi is fixed.Only tested barefoot, going to take a bit of planning to do all the braid routing so I run through the amp and tuner.